diff options
| author |   Elad Nachman <enachman@marvell.com> | 2025-08-03 13:25:48 +0300 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2025-08-05 10:35:03 +0200 |
| commit | 3c3d7dbab2c70a4bca47634d564bf659351c05ca (patch) | |
| tree | 44e82048183cdd2b6623b565d2669d314a556c64 | |
| parent | irqchip/msi-lib: Fix fwnode refcount in msi_lib_irq_domain_select() (diff) | |
| download | wireguard-linux-3c3d7dbab2c70a4bca47634d564bf659351c05ca.tar.xz wireguard-linux-3c3d7dbab2c70a4bca47634d564bf659351c05ca.zip | |
irqchip/mvebu-gicp: Clear pending interrupts on init
When a kexec'ed kernel boots up, there might be stale unhandled interrupts
pending in the interrupt controller. These are delivered as spurious
interrupts once the boot CPU enables interrupts.
Clear all pending interrupts when the driver is initialized to prevent
these spurious interrupts from locking the CPU in an endless loop.
Signed-off-by: Elad Nachman <enachman@marvell.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250803102548.669682-2-enachman@marvell.com
| -rw-r--r-- | drivers/irqchip/irq-mvebu-gicp.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-mvebu-gicp.c b/drivers/irqchip/irq-mvebu-gicp.c index d3232d6d8dce..fd85c845e015 100644 --- a/drivers/irqchip/irq-mvebu-gicp.c +++ b/drivers/irqchip/irq-mvebu-gicp.c @@ -177,6 +177,7 @@ static int mvebu_gicp_probe(struct platform_device *pdev) .ops = &gicp_domain_ops, }; struct mvebu_gicp *gicp; + void __iomem *base; int ret, i; gicp = devm_kzalloc(&pdev->dev, sizeof(*gicp), GFP_KERNEL); @@ -236,6 +237,15 @@ static int mvebu_gicp_probe(struct platform_device *pdev) return -ENODEV; } + base = ioremap(gicp->res->start, gicp->res->end - gicp->res->start); + if (IS_ERR(base)) { + dev_err(&pdev->dev, "ioremap() failed. Unable to clear pending interrupts.\n"); + } else { + for (i = 0; i < 64; i++) + writel(i, base + GICP_CLRSPI_NSR_OFFSET); + iounmap(base); + } + return msi_create_parent_irq_domain(&info, &gicp_msi_parent_ops) ? 0 : -ENOMEM; } |